US20150259918A1 - Column structure and base member - Google Patents
Column structure and base member Download PDFInfo
- Publication number
- US20150259918A1 US20150259918A1 US14/345,951 US201414345951A US2015259918A1 US 20150259918 A1 US20150259918 A1 US 20150259918A1 US 201414345951 A US201414345951 A US 201414345951A US 2015259918 A1 US2015259918 A1 US 2015259918A1
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- United States
- Prior art keywords
- base
- web
- width direction
- portions
- column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000004567 concrete Substances 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 abstract description 27
- 239000010959 steel Substances 0.000 abstract description 27
- 239000004570 mortar (masonry) Substances 0.000 description 15
- 238000005452 bending Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001747 exhibiting effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/32—Columns; Pillars; Struts of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
Definitions
- the present invention relates to a column structure to which a column member is joined at an upper side of a base member, and to a base member to which a column member is joined at an upper side thereof.
- anchor bolts are anchored to a concrete foundation, a base plate is fixed to the anchor bolts at insertion holes, and a column member is fixed to an upper side of the base plate.
- the column member is configured from H-section steel integrally provided with flanges at both sides, in a width direction, of a web.
- the anchor bolts and the insertion holes are disposed on both outer sides in the web width direction of the column member.
- an object of the present invention is to obtain a column structure which can reduce a dimension, in a web width direction, of a base member, and to obtain a base member which can reduce a dimension, in the web width direction, of a base body.
- a column structure of a first aspect of the present invention includes: a column member that is integrally provided with a flange at each of both sides in a width direction of a web; a base member to which the column member is joined at an upper side thereof; plural anchor members to each which an anchor portion is attached at a lower end side, each of which is anchored in concrete at the lower end side thereof, and each of which is fixed to the base member at an upper end side thereof, wherein a distance in a web width direction between the plural anchor members is equal to or less than a dimension in the web width direction of the column member.
- the anchor members are disposed at outer sides in the flange width direction of the column member.
- an indented portion is provided in a lower side face of the base member.
- the base member in the column structure of any one of the first aspect to the third aspect of the present invention, includes: a base portion that is provided at each of flange sides; a connection portion that connects together a pair of base portions; and a cutaway portion that is provided between the pair of base portions.
- a column structure of a fifth aspect of the present invention in the column structure of any one of the first aspect to the third aspect of the present invention, wherein the base members is provided at each flange side, and a gap is provided between the base members.
- the column structure of the fifth aspect of the present invention includes a projection portion that is provided at the base member and projects out to a web side of the flange at a lower side of the web.
- a base member of a seventh aspect of the present invention includes: a base body to which a column member is joined at an upper side thereof, the column member being integrally provided with a flange at each of both sides in a width direction of a web; and plural fixing portions that are provided at the base body, and that are each fixed to an upper end side of an anchor member to which an anchor portion is attached at a lower end side thereof the anchor member and which is anchored in concrete at the lower end side thereof, wherein a distance in a web width direction between the plural fixing portions is equal to or less than a dimension in the web width direction of the column member.
- the fixing portions are disposed at outer sides in the flange width direction of the column member.
- an indented portion is provided in a lower side face of the base body.
- the base body in the base member of any one of the seventh aspect to the ninth aspect of the present invention, includes: a base portion that is provided at each of flange sides; a connection portion that connects together a pair of base portions; and a cutaway portion that is provided between the pair of base portions.
- the base body is provided at each flange side, and a gap is provided between the base bodies.
- the base member in the base member of the eleventh aspect of the present invention, includes a projection portion that is provided to the base body and projects out to a web side of the flange at a lower side of the web.
- the column member that is integrally provided with the flange at each of both sides in the width direction of the web, is joined to the upper side of the base member.
- the anchor members each have the anchor portion attached to a lower end side thereof and the anchor members are anchored in concrete at the lower end side thereof, and the base member is fixed at the upper end side of the anchor members.
- the distance in the web width direction between the plural anchor members is equal to or less than the dimension in the web width direction of the column member. This thereby can reduce the dimension in the web width direction of the base member.
- the anchor members are disposed at outer sides in the flange width direction of the column member. This thereby enables the load bearing ability (ability to withstand a bending moment) to be efficiently exhibited by a column setup (which is a transmission portion of a bending moment from the column member to concrete, and which includes the base member and the anchor members).
- the indented portion is provided in the lower side face of the base member. This thereby enables displacement of the base member in the horizontal direction to be suppressed.
- the base member includes the base portion provided at each of the flange sides, and the connection portion that connects together the pair of base portions.
- the cutaway portion is provided between the pair of base portions. This thereby enables the weight of the base member to be reduced. However, due to the web being disposed between the pair of base portions, the load bearing ability of the column setup can be efficiently exhibited.
- the base member is provided at each flange side, and a gap is provided between the pair of base members. This thereby enables each of the base members to be made small, enabling the total weight of the pair of base members to be reduced. Moreover, due to the web being disposed between the pair of base members, the load bearing ability of the column setup can be efficiently exhibited.
- the projection portion that is provided to the base member, projects out to the web side of the flange at the lower side of the web. This thereby enables the projection portion to be joined to the web, enabling the column member to be joined to the base member strongly.
- the column member integrally provided with a flange at each of both sides in the width direction of the web is joined to the upper side of the base body.
- the anchor members each have the anchor portion attached at the lower end side thereof and the anchor members are anchored in concrete at the lower end side thereof, and the fixing portion of the base body is fixed to the upper end side of the anchor member.
- the distance in the web width direction between the plural fixing portions is equal to or less than the web width direction dimension of the column member. This thereby can reduce the dimension in the web width direction of the base body.
- the fixing portions are disposed at outer sides in the flange width direction of the column member. This thereby enables the load bearing ability of the column setup (which is a transmission portion of a bending moment from the column member to concrete, and which includes the base body and the anchor members) to be efficiently exhibited.
- the indented portion is provided in the lower side face of the base body. This thereby enables displacement of the base body in the horizontal direction to be suppressed.
- the base portion is provided at each of the flange sides in the base body, and the connection portion connects together the pair of base portions.
- the cutaway portion is also provided between the pair of base portions. This thereby enables the weight of the base body to be reduced. Further, due to the web being disposed between the pair of base portions, the load bearing ability of the column setup can still be efficiently exhibited.
- the base body is provided at each of the flange sides, and the gap is provided between the pair of base bodies. This thereby enables each of the base bodies to be made small, enabling the total weight of the pair of base bodies to be reduced. Further, due to the web being disposed between the pair of base bodies, the load bearing ability of the column setup can still be efficiently exhibited.
- a projection portion provided at the base body projects out to the web side of the flange at the lower side of the web. This thereby enables the project portion to be joined to the web, enabling the column member to be joined to the base member strongly.
- FIG. 1 is a cross-section illustrating a column structure according to a first exemplary embodiment of the present invention, as viewed from the front.
- FIG. 2 is a plan view illustrating the column structure according to the first exemplary embodiment of the present invention.
- FIG. 3 is a plan view illustrating the column structure according to a second exemplary embodiment of the present invention.
- FIG. 4 is a plan view illustrating the column structure according to a third exemplary embodiment of the present invention.
- FIG. 1 A cross-section of a column structure 10 according to a first exemplary embodiment of the present invention is illustrated in FIG. 1 , as viewed from the front; a plan view of the column structure 10 according to the first exemplary embodiment of the present invention is illustrated in FIG. 2 .
- the arrow FR indicates the forward
- the arrow RH indicates the right direction
- the arrow UP indicates upward.
- the column structure 10 As illustrated in FIG. 1 and FIG. 2 , the column structure 10 according to the present exemplary embodiment is placed on a foundation concrete 12 , serving as concrete, with the upper face of the foundation concrete 12 configured in a flat plane shape and the column structure 10 disposed perpendicular thereto along the up-down direction.
- Mortar 14 is fixed to the upper face of the foundation concrete 12 as a fixing means, and the mortar 14 is provided in a rectangular shape in plan view.
- a metal base plate 16 serving as a base member and as a base body is fixed to the upper face of the mortar 14 .
- the mortar 14 is disposed across the entire lower side of the base plate 16 .
- the base plate 16 is formed in a rectangular plate shape, and the base plate 16 is disposed such that the length direction and width direction thereof are respectively parallel to the front-rear direction and the left-right direction, with the front-rear direction dimension greater than the left-right direction dimension.
- Circular shaped fixing holes 18 that each serve as a fixing portion are formed and penetrated through at end portions (corner portions) at the both sides in the front-rear direction and the both sides in the left-right direction of the base plate 16 , with the axial direction of the fixing holes 18 parallel to the up-down direction.
- the positions in the left-right direction of the pair of fixing holes 18 (the center axial lines thereof) on the left side, and the positions in the left-right direction of the pair of fixing holes 18 (the center axial lines thereof) on the right side are respectively aligned with each other; the pair of fixing holes 18 (the center axial lines thereof) on the left side, and the pair of fixing holes 18 (the center axial lines thereof) on the right side are disposed symmetrically to each other about a vertical plane perpendicular to the left-right direction and passing through the center in the left-right direction of the base plate 16 .
- the positions in the front-rear direction of the pair of fixing holes 18 (the center axial lines thereof) at the front side, and the positions in the front-rear direction of the pair of fixing holes 18 (the center axial lines thereof) at the rear side are respectively aligned with each other; the pair of fixing holes 18 (the center axial lines thereof) at the front side, and the pair of fixing holes 18 (the center axial lines thereof) at the rear side are disposed symmetrically to each other about a vertical plane perpendicular to the front-rear direction and passing through the center in the front-rear direction of the base plate 16 .
- Indented portions 22 are formed to the lower face of the base plate 16 at the periphery of each of the fixing holes 18 ; the upper face (bottom face) of each of the indented portions 22 is a flat plane shape disposed perpendicular to the up-down direction.
- the indented portions 22 are formed in triangular shapes in plan view, with a width dimension that gradually increases on progression toward the outer peripheral side of the base plate 16 , with the indented portion 22 open to the outer side of the outer periphery of the base plate 16 .
- the peripheral face of each of the indented portions 22 is disposed perpendicular to the horizontal direction, and the base plate 16 center side end peripheral face of each of the indented portion 22 is in the same plane as the peripheral face of the respective fixing hole 18 .
- the mortar 14 fills the whole of the indented portions 22 , and the base plate 16 is anchored in the horizontal direction to the mortar 14 by the peripheral faces of the indented portions 22 .
- Circular rod shape anchor bodies 28 are respectively provided at the anchor bolts 24 , with the anchor bodies 28 disposed with their axial directions parallel to the up-down direction, and with portions of the anchor bodies 28 other than an upper end portion buried in the foundation concrete 12 , with the upper end portion penetrating through the mortar 14 .
- An anchor nut 30 that has a multifaceted tube shaped external profile and configures an anchor portion, is threaded coaxially on to a lower end portion of each of the anchor bodies 28 , and directly above the anchor nut 30 , the lower end portion of each of the anchor bodies 28 passes coaxially through a circular ring plate-shaped fixing plate 32 that configures the anchor portion.
- the anchor nut 30 and the fixing plate 32 are thereby attached to the lower end portion outer periphery of each of the anchor bodies 28 .
- the anchor nut 30 and the fixing plate 32 protrude out to the outer side in the radial direction of each of the anchor bodies 28 and are buried in the foundation concrete 12 .
- the anchor bolts 24 are thereby anchored in the up-down direction to the foundation concrete 12 by the anchor nut 30 and the fixing plate 32 .
- each of the anchor bodies 28 passes through the base plate 16 coaxially to the respective fixing hole 18 .
- a fixing nut 34 that has a multifaceted tube shaped external profile is threaded coaxially on to an upper end portion of each of the respective anchor bodies 28 , and directly below the fixing nut 34 , the upper end portion of each of the anchor bodies 28 passes coaxially through a circular ring plate-shaped washer 36 .
- the fixing nut 34 and the washer 36 are thereby attached to the outer periphery of the upper end portion of each of the anchor bodies 28 .
- Each of the washers 36 and the base plate 16 is clamped between the fixing nut 34 and the mortar 14 , and the base plate 16 is fixed to the anchor bolts 24 at the fixing holes 18 .
- the lower end of a steel column 38 serving as a column member is welded (joined) to a central side portion of the upper face of the base plate 16 , with the length direction of the steel column 38 disposed parallel to the up-down direction.
- An elongated rectangular shaped web 38 A is provided at the steel column 38 .
- the web 38 A is disposed at the center in the front-rear direction of the base plate 16 with its width direction disposed parallel to the left-right direction, with the center in the width direction of the web 38 A aligned with the center in the left-right direction of the base plate 16 .
- Elongated rectangular shaped flanges 38 B are respectively integrally provided at the both ends in the width direction of the web 38 A.
- the flanges 38 B are disposed at the left side portion and the right side portion of the base plate 16 , with their width directions parallel to the front-rear direction.
- each of the flanges 38 B is connected to the web 38 A, and the flanges 38 B extend out forward and rearward with respect to the web 38 A.
- the steel column 38 is therefore formed in an H-section as viewed in column structure from the up-down direction.
- the dimension in the web 38 A width direction of the base plate 16 is slightly greater than the dimension in the web 38 A width direction of the steel column 38 .
- the center axial lines of the fixing holes 18 and the anchor bolts 24 are disposed at outer sides in the flange 38 B width direction of the steel column 38 , and the dimension of in the flange 38 B width direction of the base plate 16 is equal to or more than the dimension in the flange 38 B width direction (the dimension in the flange 38 B width direction) of the steel column 38 (for example, 3 times).
- the center axial lines of the fixing holes 18 and the anchor bolts 24 are disposed further inside in the web 38 A width direction (including positions facing the flanges 38 B in the flanges 38 B width direction) than outer side faces in the web 38 A width direction of the steel column 38 (faces on the opposite sides of the flanges 38 B to the web 38 A sides).
- the distance in the web 38 A width direction between the center axial lines of the fixing holes 18 and the anchor bolts 24 (the maximum distance in the web 38 A width direction between the center axial lines of the fixing holes 18 and the anchor bolts 24 ) is equal to or less than the dimension in the web 38 A width direction of the steel column 38 .
- the steel column 38 is welded to the upper face of the base plate 16 , and in the steel column 38 , the flanges 38 B are integrally provided at the both ends in the width direction (left-right direction) of the web 38 A.
- the anchor bolts 24 are anchored in the up-down direction to the foundation concrete 12 by the anchor nuts 30 and the fixing plates 32 , and the base plate 16 is fixed by the anchor bolts 24 at the fixing holes 18 .
- the distance in the web 38 A width direction between the center axial lines of the anchor bolts 24 (of the fixing holes 18 ) is equal to or less than the dimension in the web 38 A width direction of the steel column 38 . This thereby can reduce the amount of the base plate 16 that projects out to the both outer sides in the web 38 A width directions with respect to the steel column 38 , and can reduce the dimension in the web 38 A width direction of the base plate 16 .
- the center axial lines of the anchor bolts 24 are placed at the outer side of the steel column 38 in the both flange 38 B width directions (the front-rear direction), and the dimension in the flange 38 B width direction of the base plate 16 is equal to or more than the dimension in the flange 38 B width direction of the steel column 38 .
- the surface area over which upward stress acts on the base plate 16 can be made large, and hence the upward stress per unit surface area acting on the base plate 16 can be made smaller. This thereby enables a column setup (the portion where a bending moment is transmitted from the steel column 38 to the foundation concrete 12 , including the base plate 16 , the mortar 14 and the anchor bolts 24 ) to be efficiently suppressed from exhibiting a drop in load bearing ability (the ability to withstand the bending moment).
- the base plate 16 is anchored to the mortar 14 in the horizontal direction by the peripheral faces of the indented portions 22 .
- the base plate 16 is anchored to the mortar 14 in the horizontal direction by the peripheral faces of the indented portions 22 .
- FIG. 3 is a plan view illustrating a column structure 40 according to the second exemplary embodiment of the present invention.
- the column structure 40 according to the present exemplary embodiment is configured substantially the same as the first exemplary embodiment, but differs in the following points.
- pentagonal flat plate shaped base portions 16 A are provided at the left side portion and the right side portion of the base plate 16
- a rectangular flat plate shaped connection portion 16 D is provided between the pair of base portions 16 A
- the mortar 14 is disposed across the entire lower side of the pair of base portions 16 A and the connection portion 16 D.
- the connection portion 16 D is disposed with its length direction parallel to the left-right direction, connecting together the pair of base portions 16 A.
- Cutaway portions 16 E are formed between the pair of base portions 16 A at both outer sides in the width direction (front-rear direction) of the connection portion 16 D.
- the pair of base portions 16 A, the connection portion 16 D, and the pair of cutaway portions 16 E are disposed symmetrically with respect to a vertical plane that is perpendicular to the left-right direction and passes through the center in the left-right direction of the base plate 16 , and are also disposed symmetrically with respect to a vertical plane that is perpendicular to the front-rear direction and passes through the center in the front-rear direction of the base plate 16 .
- the web 38 A sides of the flanges 38 B configure projection portions 16 C that are formed in pentagonal shapes in plan view, and the inside portions of the projection portions 16 C in the web 38 A width direction are formed in isosceles triangular shapes in plan view, with portions in the base portions 16 A other than inside portions in the web 38 A width direction of the projection portions 16 C formed as rectangular shapes in plan view.
- the inside portions in the web 38 A width direction of the projection portions 16 C have a dimension in the flange 38 B width direction that gradually gets smaller on progression toward inside in the web 38 A width direction.
- the cutaway portions 16 E have a dimension in the web 38 A width direction that gradually gets larger on progression toward the outer side in the flange 38 B width direction.
- the inside ends in the web 38 A width direction of the base portions 16 A are disposed at the lower side of the web 38 A.
- the base portions 16 A of the base plate 16 are disposed at the lower side of each of the flanges 38 B, and the lower ends of the flanges 38 B are respectively welded to the upper faces of the base portions 16 A.
- the projection portions 16 C of the base portions 16 A are disposed at the lower side of end portions in the width direction of the web 38 A, and the lower end of end portions in the width direction of the web 38 A are welded to the upper face of the projection portions 16 C.
- the connection portion 16 D of the base plate 16 is disposed at the lower side of the central portion of the width direction of the web 38 A, and the lower side of the central portion the web 38 A width direction is welded to upper face of the connection portion 16 D.
- the position in the front-rear direction of the central portion in the width direction of the connection portion 16 D is aligned with the position in the front-rear direction of the center in the thickness direction of the web 38 A.
- the dimension in the width direction of the connection portion 16 D is, for example, set at from 3 times to 5 times the dimension in the web 38 A thickness direction (in the front-rear direction).
- the present exemplary embodiment is also capable of exhibiting similar operation and advantageous effects to those of the first exemplary embodiment.
- the base portions 16 A are provided at the left side portion and the right side portion of the base plate 16 , and the cutaway portions 16 E are provided between the pair of base portions 16 A.
- a drop load bearing ability of the column setup at a lower side portion of the web 38 A is suppressed by the web 38 A.
- the position between the pair of base portions 16 A accordingly imparts only a small influence on the load bearing ability of the base plate 16 , enabling the load bearing ability of the column setup to be efficiently exhibited as before, even though the cutaway portions 16 E are provided between the pair of base portions 16 A.
- the projection portions 16 C of the base portions 16 A project out further than the flanges 38 B to the web 38 A side at the lower side of the web 38 A, and the lower end of the end portions in the web 38 A width direction are welded to the projection portions 16 C.
- the connection portion 16 D connects the pair of base portions 16 A, and the lower end of the center portion in the width direction of the web 38 A is welded to the connection portion 16 D. This thereby enables the steel column 38 to be welded to the base plate 16 strongly.
- the projection portions 16 C are made smaller, and the cutaway portions 16 E are made larger. This thereby enables the weight of the base plate 16 to be reduced further, and enabling more excellent utilization efficiency (yield) of material for the pair of base plates 16 .
- cutaway portions 16 E are only provided on the web 38 A sides of the flanges 38 B. However, the cutaway portions 16 E may also be provided on the opposite side of the flanges 38 B to the web 38 A side.
- a column structure 50 according to the third exemplary embodiment of the present invention is illustrated in a plan view in FIG. 4 .
- the column structure 50 according to the present exemplary embodiment is configured substantially the same as the first exemplary embodiment, but differs in the following points.
- mortar 14 is provided at the left side and the right side, with the pair of mortars 14 each provided in a pentagonal shape, as illustrated in the plan view.
- a base plate 16 is provided in a pentagonal shape, as illustrated in the plan view, at the left side and the right side, with a gap 16 B present between the pair of base plates 16 , and the mortars 14 on the left side and the right side are respectively disposed across the entire lower side of the left side and the right side base plates 16 .
- the pair of base plates 16 and the gap 16 B are disposed symmetrically with respect to a vertical plane that is perpendicular to the web 38 A width direction and passes through the center in the width direction (left-right direction) of the web 38 A, and are also disposed symmetrically with respect to a vertical plane that is perpendicular to the flange 38 B width direction and passes through the center in the width direction (the front-rear direction) of the flanges 38 B.
- the shape and the size in the plan view of the pair of base plate 16 and the and the gap 16 B are the same as the shape and size of the base plate 16 of the first exemplary embodiment in the plan view, with a pair of first fixing holes 18 similarly formed in the left side and right side base plates 16 to those in the left side portion and the right side portion of the base plate 16 in the first exemplary embodiment.
- the web 38 A sides of the flanges 38 B configure projection portions 16 C that are formed in pentagonal shapes in the plan view, and the inside portions in the web 38 A width direction of the projection portions 16 C are formed in isosceles triangular shapes in the plan view, with portions in the base plates 16 other than the inside portions in the web 38 A width direction of the projection portions 16 C formed as rectangular shapes in the plan view.
- the inside portions in the web 38 A width direction of the projection portions 16 C have a dimension in the flange 38 B width direction that gradually gets smaller on progression toward inside in the web 38 A width direction, and the dimension in the web 38 A width direction of the gap 16 B gradually gets larger on progression toward outer sides in the flange 38 B width direction.
- the inside ends in the web 38 A width direction of the base plates 16 are disposed at the lower side of the web 38 A.
- the base plates 16 are disposed at the lower side of each of the flanges 38 B, and the lower ends of the flanges 38 B are respectively welded to the upper faces of the base plates 16 .
- the projection portions 16 C of the base plates 16 are disposed at the lower side of the end portions in the width direction of the web 38 A, and the lower end of end portions in the width direction of the web 38 A are welded to the upper face of the projection portions 16 C.
- the gap 16 B is disposed between the pair of base plates 16 , and the lower ends of the center portion in the width direction of the web 38 A is not welded to the base plates 16 .
- the present exemplary embodiment is also capable of exhibiting similar operation and advantageous effects to those of the first exemplary embodiment.
- the base plates 16 are provided at the lower side of each of the flanges 38 B, and the gap 16 B is provided between the pair of the base plates 16 .
- each of the base plates 16 can be made smaller, enabling the total weight of the pair of base plates 16 to be reduced, thereby enabling excellent utilization efficiency (yield) of material for the pair of base plates 16 .
- the portion between the pair of base plates 16 is a portion that imparts small influence to the load bearing ability of the column setup. This thereby enables the load bearing ability of the column setup to be efficiently exhibited as before, even though the gap 16 B is provided between the pair of base plates 16 .
- the projection portions 16 C of the base plates 16 project out further than the flanges 38 B to the web 38 A side at the lower side of the web 38 A, and the lower ends of the end portions in the web 38 A width direction are welded to the projection portions 16 C. This thereby enables steel column 38 to be welded to the base plates 16 strongly.
- the inside portions in the web 38 A width direction of the base plates 16 are formed in isosceles triangles in the plan view, such that the projection portions 16 C are smaller and the gap 16 B is larger. This thereby enables the size of each of the base plates 16 in the plan view to be made even smaller, enabling the total weight of the pair of base plates 16 to be further reduced, and enabling more excellent utilization efficiency (yield) of material for the pair of base plates 16 .
- the gap 16 B is only provided on the web 38 A side of the flanges 38 B.
- the gap 16 B may also be provided on the opposite side of the flanges 38 B to the web 38 A side.
- the center axial lines of the fixing holes 18 and the anchor bolts 24 are disposed to the outer side in the width direction of the flanges 38 B.
- the center axial lines of the fixing holes 18 and the anchor bolts 24 may be disposed at the inside in the width direction of the flanges 38 B.
- a pair of each of the fixing holes 18 and the anchor bolts 24 is provided at each of the right side portion and the left side portion of the base plate 16 , or to each of the pair of base plates 16 .
- all of the anchor bolts 24 are anchored into the same foundation concrete 12 .
- different anchor bolts 24 may be anchored to separate foundation concretes 12 .
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Abstract
In a column structure, a steel column having flanges integrally provided at both ends in a width direction of a web is welded to a base plate. Anchor bolts are anchored to a foundation concrete, and the base plate is fixed to the anchor bolts. The distance in the web width direction between the center axial lines of the anchor bolts is equal to or less than the dimension in the web width direction of the steel column.
Description
- The present invention relates to a column structure to which a column member is joined at an upper side of a base member, and to a base member to which a column member is joined at an upper side thereof.
- In Japanese Patent No. 4570139, anchor bolts are anchored to a concrete foundation, a base plate is fixed to the anchor bolts at insertion holes, and a column member is fixed to an upper side of the base plate. The column member is configured from H-section steel integrally provided with flanges at both sides, in a width direction, of a web.
- The anchor bolts and the insertion holes are disposed on both outer sides in the web width direction of the column member.
- In consideration of the above circumstances, an object of the present invention is to obtain a column structure which can reduce a dimension, in a web width direction, of a base member, and to obtain a base member which can reduce a dimension, in the web width direction, of a base body.
- A column structure of a first aspect of the present invention includes: a column member that is integrally provided with a flange at each of both sides in a width direction of a web; a base member to which the column member is joined at an upper side thereof; plural anchor members to each which an anchor portion is attached at a lower end side, each of which is anchored in concrete at the lower end side thereof, and each of which is fixed to the base member at an upper end side thereof, wherein a distance in a web width direction between the plural anchor members is equal to or less than a dimension in the web width direction of the column member.
- According to a column structure of a second aspect of the present invention, in the column structure of the first aspect of the present invention, the anchor members are disposed at outer sides in the flange width direction of the column member.
- According to a column structure of a third aspect of the present invention, in the column structure of the first aspect or the second aspect of the present invention, an indented portion is provided in a lower side face of the base member.
- According to a column structure of a fourth aspect of the present invention, in the column structure of any one of the first aspect to the third aspect of the present invention, the base member includes: a base portion that is provided at each of flange sides; a connection portion that connects together a pair of base portions; and a cutaway portion that is provided between the pair of base portions.
- According to a column structure of a fifth aspect of the present invention, in the column structure of any one of the first aspect to the third aspect of the present invention, wherein the base members is provided at each flange side, and a gap is provided between the base members.
- According to a column structure of a sixth aspect of the present invention, in the column structure of the fifth aspect of the present invention, the column structure includes a projection portion that is provided at the base member and projects out to a web side of the flange at a lower side of the web.
- A base member of a seventh aspect of the present invention includes: a base body to which a column member is joined at an upper side thereof, the column member being integrally provided with a flange at each of both sides in a width direction of a web; and plural fixing portions that are provided at the base body, and that are each fixed to an upper end side of an anchor member to which an anchor portion is attached at a lower end side thereof the anchor member and which is anchored in concrete at the lower end side thereof, wherein a distance in a web width direction between the plural fixing portions is equal to or less than a dimension in the web width direction of the column member.
- According to a base member of an eighth aspect of the present invention, in the base member of the seventh aspect of the present invention, the fixing portions are disposed at outer sides in the flange width direction of the column member.
- According to a base member of a ninth aspect of the present invention, in the base member of the seventh aspect or the eighth aspect of the present invention, an indented portion is provided in a lower side face of the base body.
- According to a base member of a tenth aspect of the present invention, in the base member of any one of the seventh aspect to the ninth aspect of the present invention, the base body includes: a base portion that is provided at each of flange sides; a connection portion that connects together a pair of base portions; and a cutaway portion that is provided between the pair of base portions.
- According to a base member of an eleventh aspect of the present invention, in the base member of any one of the seventh aspect to the ninth aspect of the present invention, the base body is provided at each flange side, and a gap is provided between the base bodies.
- According to a base member of a twelfth aspect of the present invention, in the base member of the eleventh aspect of the present invention, the base member includes a projection portion that is provided to the base body and projects out to a web side of the flange at a lower side of the web.
- In the column structure of the first aspect of the present invention, the column member, that is integrally provided with the flange at each of both sides in the width direction of the web, is joined to the upper side of the base member. The anchor members each have the anchor portion attached to a lower end side thereof and the anchor members are anchored in concrete at the lower end side thereof, and the base member is fixed at the upper end side of the anchor members.
- The distance in the web width direction between the plural anchor members is equal to or less than the dimension in the web width direction of the column member. This thereby can reduce the dimension in the web width direction of the base member.
- In the column structure of the second aspect of the present invention, the anchor members are disposed at outer sides in the flange width direction of the column member. This thereby enables the load bearing ability (ability to withstand a bending moment) to be efficiently exhibited by a column setup (which is a transmission portion of a bending moment from the column member to concrete, and which includes the base member and the anchor members).
- In the column structure of the third aspect of the present invention, the indented portion is provided in the lower side face of the base member. This thereby enables displacement of the base member in the horizontal direction to be suppressed.
- In the column structure of the fourth aspect of the present invention, the base member includes the base portion provided at each of the flange sides, and the connection portion that connects together the pair of base portions.
- The cutaway portion is provided between the pair of base portions. This thereby enables the weight of the base member to be reduced. However, due to the web being disposed between the pair of base portions, the load bearing ability of the column setup can be efficiently exhibited.
- In the column structure of the fifth aspect of the present invention, the base member is provided at each flange side, and a gap is provided between the pair of base members. This thereby enables each of the base members to be made small, enabling the total weight of the pair of base members to be reduced. Moreover, due to the web being disposed between the pair of base members, the load bearing ability of the column setup can be efficiently exhibited.
- In the column structure of the sixth aspect of the present invention, the projection portion, that is provided to the base member, projects out to the web side of the flange at the lower side of the web. This thereby enables the projection portion to be joined to the web, enabling the column member to be joined to the base member strongly.
- In the base member of the seventh aspect of the present invention, the column member integrally provided with a flange at each of both sides in the width direction of the web is joined to the upper side of the base body. The anchor members each have the anchor portion attached at the lower end side thereof and the anchor members are anchored in concrete at the lower end side thereof, and the fixing portion of the base body is fixed to the upper end side of the anchor member.
- The distance in the web width direction between the plural fixing portions is equal to or less than the web width direction dimension of the column member. This thereby can reduce the dimension in the web width direction of the base body.
- In the base member of the eighth aspect of the present invention, the fixing portions are disposed at outer sides in the flange width direction of the column member. This thereby enables the load bearing ability of the column setup (which is a transmission portion of a bending moment from the column member to concrete, and which includes the base body and the anchor members) to be efficiently exhibited.
- In the base member of the ninth aspect of the present invention, the indented portion is provided in the lower side face of the base body. This thereby enables displacement of the base body in the horizontal direction to be suppressed.
- In the base member of the tenth aspect of the present invention, the base portion is provided at each of the flange sides in the base body, and the connection portion connects together the pair of base portions.
- The cutaway portion is also provided between the pair of base portions. This thereby enables the weight of the base body to be reduced. Further, due to the web being disposed between the pair of base portions, the load bearing ability of the column setup can still be efficiently exhibited.
- In the base member of the eleventh aspect of the present invention, the base body is provided at each of the flange sides, and the gap is provided between the pair of base bodies. This thereby enables each of the base bodies to be made small, enabling the total weight of the pair of base bodies to be reduced. Further, due to the web being disposed between the pair of base bodies, the load bearing ability of the column setup can still be efficiently exhibited.
- In the base member of the twelfth aspect of the present invention, a projection portion provided at the base body projects out to the web side of the flange at the lower side of the web. This thereby enables the project portion to be joined to the web, enabling the column member to be joined to the base member strongly.
-
FIG. 1 is a cross-section illustrating a column structure according to a first exemplary embodiment of the present invention, as viewed from the front. -
FIG. 2 is a plan view illustrating the column structure according to the first exemplary embodiment of the present invention. -
FIG. 3 is a plan view illustrating the column structure according to a second exemplary embodiment of the present invention. -
FIG. 4 is a plan view illustrating the column structure according to a third exemplary embodiment of the present invention. - A cross-section of a
column structure 10 according to a first exemplary embodiment of the present invention is illustrated inFIG. 1 , as viewed from the front; a plan view of thecolumn structure 10 according to the first exemplary embodiment of the present invention is illustrated inFIG. 2 . Note that in the drawings, the arrow FR indicates the forward, and the arrow RH indicates the right direction, and the arrow UP indicates upward. - As illustrated in
FIG. 1 andFIG. 2 , thecolumn structure 10 according to the present exemplary embodiment is placed on afoundation concrete 12, serving as concrete, with the upper face of thefoundation concrete 12 configured in a flat plane shape and thecolumn structure 10 disposed perpendicular thereto along the up-down direction. -
Mortar 14 is fixed to the upper face of the foundation concrete 12 as a fixing means, and themortar 14 is provided in a rectangular shape in plan view. - A
metal base plate 16 serving as a base member and as a base body is fixed to the upper face of themortar 14. Themortar 14 is disposed across the entire lower side of thebase plate 16. Thebase plate 16 is formed in a rectangular plate shape, and thebase plate 16 is disposed such that the length direction and width direction thereof are respectively parallel to the front-rear direction and the left-right direction, with the front-rear direction dimension greater than the left-right direction dimension. - Circular shaped fixing
holes 18 that each serve as a fixing portion are formed and penetrated through at end portions (corner portions) at the both sides in the front-rear direction and the both sides in the left-right direction of thebase plate 16, with the axial direction of the fixing holes 18 parallel to the up-down direction. The positions in the left-right direction of the pair of fixing holes 18 (the center axial lines thereof) on the left side, and the positions in the left-right direction of the pair of fixing holes 18 (the center axial lines thereof) on the right side are respectively aligned with each other; the pair of fixing holes 18 (the center axial lines thereof) on the left side, and the pair of fixing holes 18 (the center axial lines thereof) on the right side are disposed symmetrically to each other about a vertical plane perpendicular to the left-right direction and passing through the center in the left-right direction of thebase plate 16. The positions in the front-rear direction of the pair of fixing holes 18 (the center axial lines thereof) at the front side, and the positions in the front-rear direction of the pair of fixing holes 18 (the center axial lines thereof) at the rear side are respectively aligned with each other; the pair of fixing holes 18 (the center axial lines thereof) at the front side, and the pair of fixing holes 18 (the center axial lines thereof) at the rear side are disposed symmetrically to each other about a vertical plane perpendicular to the front-rear direction and passing through the center in the front-rear direction of thebase plate 16. -
Indented portions 22 are formed to the lower face of thebase plate 16 at the periphery of each of the fixing holes 18; the upper face (bottom face) of each of theindented portions 22 is a flat plane shape disposed perpendicular to the up-down direction. Theindented portions 22 are formed in triangular shapes in plan view, with a width dimension that gradually increases on progression toward the outer peripheral side of thebase plate 16, with theindented portion 22 open to the outer side of the outer periphery of thebase plate 16. The peripheral face of each of theindented portions 22 is disposed perpendicular to the horizontal direction, and thebase plate 16 center side end peripheral face of each of theindented portion 22 is in the same plane as the peripheral face of therespective fixing hole 18. Themortar 14 fills the whole of theindented portions 22, and thebase plate 16 is anchored in the horizontal direction to themortar 14 by the peripheral faces of theindented portions 22. - Two pairs each of
anchor bolts 24 serving as anchor members and serving as second anchor members are respectively fixed to thefoundation concrete 12. Circular rodshape anchor bodies 28 are respectively provided at theanchor bolts 24, with theanchor bodies 28 disposed with their axial directions parallel to the up-down direction, and with portions of theanchor bodies 28 other than an upper end portion buried in the foundation concrete 12, with the upper end portion penetrating through themortar 14. - An
anchor nut 30 that has a multifaceted tube shaped external profile and configures an anchor portion, is threaded coaxially on to a lower end portion of each of theanchor bodies 28, and directly above theanchor nut 30, the lower end portion of each of theanchor bodies 28 passes coaxially through a circular ring plate-shapedfixing plate 32 that configures the anchor portion. Theanchor nut 30 and the fixingplate 32 are thereby attached to the lower end portion outer periphery of each of theanchor bodies 28. Theanchor nut 30 and the fixingplate 32 protrude out to the outer side in the radial direction of each of theanchor bodies 28 and are buried in thefoundation concrete 12. Theanchor bolts 24 are thereby anchored in the up-down direction to the foundation concrete 12 by theanchor nut 30 and the fixingplate 32. - The upper end portion of the each of the
anchor bodies 28 passes through thebase plate 16 coaxially to therespective fixing hole 18. A fixingnut 34 that has a multifaceted tube shaped external profile is threaded coaxially on to an upper end portion of each of therespective anchor bodies 28, and directly below the fixingnut 34, the upper end portion of each of theanchor bodies 28 passes coaxially through a circular ring plate-shapedwasher 36. The fixingnut 34 and thewasher 36 are thereby attached to the outer periphery of the upper end portion of each of theanchor bodies 28. Each of thewashers 36 and thebase plate 16 is clamped between the fixingnut 34 and themortar 14, and thebase plate 16 is fixed to theanchor bolts 24 at the fixing holes 18. - The lower end of a
steel column 38 serving as a column member is welded (joined) to a central side portion of the upper face of thebase plate 16, with the length direction of thesteel column 38 disposed parallel to the up-down direction. - An elongated rectangular shaped
web 38A is provided at thesteel column 38. Theweb 38A is disposed at the center in the front-rear direction of thebase plate 16 with its width direction disposed parallel to the left-right direction, with the center in the width direction of theweb 38A aligned with the center in the left-right direction of thebase plate 16. Elongated rectangular shapedflanges 38B are respectively integrally provided at the both ends in the width direction of theweb 38A. Theflanges 38B are disposed at the left side portion and the right side portion of thebase plate 16, with their width directions parallel to the front-rear direction. The center in the width direction of each of theflanges 38B is connected to theweb 38A, and theflanges 38B extend out forward and rearward with respect to theweb 38A. Thesteel column 38 is therefore formed in an H-section as viewed in column structure from the up-down direction. The dimension in theweb 38A width direction of thebase plate 16 is slightly greater than the dimension in theweb 38A width direction of thesteel column 38. - At the left side portion and the right side portion of the
base plate 16, the center axial lines of the fixing holes 18 and theanchor bolts 24 are disposed at outer sides in theflange 38B width direction of thesteel column 38, and the dimension of in theflange 38B width direction of thebase plate 16 is equal to or more than the dimension in theflange 38B width direction (the dimension in theflange 38B width direction) of the steel column 38 (for example, 3 times). Moreover, the center axial lines of the fixing holes 18 and theanchor bolts 24 are disposed further inside in theweb 38A width direction (including positions facing theflanges 38B in theflanges 38B width direction) than outer side faces in theweb 38A width direction of the steel column 38 (faces on the opposite sides of theflanges 38B to theweb 38A sides). The distance in theweb 38A width direction between the center axial lines of the fixing holes 18 and the anchor bolts 24 (the maximum distance in theweb 38A width direction between the center axial lines of the fixing holes 18 and the anchor bolts 24) is equal to or less than the dimension in theweb 38A width direction of thesteel column 38. - Explanation next follows regarding operation of the present exemplary embodiment.
- In the
column structure 10 configured as above, thesteel column 38 is welded to the upper face of thebase plate 16, and in thesteel column 38, theflanges 38B are integrally provided at the both ends in the width direction (left-right direction) of theweb 38A. Theanchor bolts 24 are anchored in the up-down direction to the foundation concrete 12 by the anchor nuts 30 and the fixingplates 32, and thebase plate 16 is fixed by theanchor bolts 24 at the fixing holes 18. - The distance in the
web 38A width direction between the center axial lines of the anchor bolts 24 (of the fixing holes 18) is equal to or less than the dimension in theweb 38A width direction of thesteel column 38. This thereby can reduce the amount of thebase plate 16 that projects out to the both outer sides in theweb 38A width directions with respect to thesteel column 38, and can reduce the dimension in theweb 38A width direction of thebase plate 16. This thereby enables thecolumn structure 10 to be placed even in a case in which it is not possible to make a dimension in theweb 38A width direction of thebase plate 16 large, such as cases in which thecolumn structure 10 is placed in the vicinity of the outer periphery of a building in a state in which one side in theweb 38A width direction of thecolumn structure 10 faces toward the outer periphery of the building. - Moreover, the center axial lines of the anchor bolts 24 (the fixing holes 18) are placed at the outer side of the
steel column 38 in the bothflange 38B width directions (the front-rear direction), and the dimension in theflange 38B width direction of thebase plate 16 is equal to or more than the dimension in theflange 38B width direction of thesteel column 38. Thus, even when, such as during an earthquake, a rotation moment acts in theflange 38B width direction (front-rear direction) on thesteel column 38 about the lower end thereof and a bending moment acts on thebase plate 16 in theflange 38B width direction, consequently, stress (compression force due to themortar 14 and the foundation concrete 12) acts upward at one side portion in theflange 38B width direction of thebase plate 16 and stress (tensile force due to the anchor bolts 24) acts downward at the other side portion in theflange 38B width direction of thebase plate 16, it is possible to enlarge a distance in theflange 38B width direction between the portion of thebase plate 16 at which the stress acts upward and the portion of thebase plate 16 at which the stress acts downward and to enlarge a direction in theflange 38B width direction, between the centers of stress acting upward and stress acting downward on thebase plate 16, thereby enabling the stress acting upward and the stress acting downward on thebase plate 16 to be made smaller. Moreover, the surface area over which upward stress acts on thebase plate 16 can be made large, and hence the upward stress per unit surface area acting on thebase plate 16 can be made smaller. This thereby enables a column setup (the portion where a bending moment is transmitted from thesteel column 38 to the foundation concrete 12, including thebase plate 16, themortar 14 and the anchor bolts 24) to be efficiently suppressed from exhibiting a drop in load bearing ability (the ability to withstand the bending moment). - Moreover, the
base plate 16 is anchored to themortar 14 in the horizontal direction by the peripheral faces of theindented portions 22. Thus, even in cases in which load acts on thebase plate 16 in the horizontal direction, such as during an earthquake, displacement of thebase plate 16 in the horizontal direction can be suppressed. This thereby enables the shear capacity of thesteel column 38 and theanchor bolts 24 to be raised. -
FIG. 3 is a plan view illustrating acolumn structure 40 according to the second exemplary embodiment of the present invention. - The
column structure 40 according to the present exemplary embodiment is configured substantially the same as the first exemplary embodiment, but differs in the following points. - As illustrated in
FIG. 3 , in thecolumn structure 40 according to the present exemplary embodiment, pentagonal flat plate shapedbase portions 16A are provided at the left side portion and the right side portion of thebase plate 16, a rectangular flat plate shaped connection portion 16D is provided between the pair ofbase portions 16A, and themortar 14 is disposed across the entire lower side of the pair ofbase portions 16A and the connection portion 16D. The connection portion 16D is disposed with its length direction parallel to the left-right direction, connecting together the pair ofbase portions 16A.Cutaway portions 16E are formed between the pair ofbase portions 16A at both outer sides in the width direction (front-rear direction) of the connection portion 16D. The pair ofbase portions 16A, the connection portion 16D, and the pair ofcutaway portions 16E are disposed symmetrically with respect to a vertical plane that is perpendicular to the left-right direction and passes through the center in the left-right direction of thebase plate 16, and are also disposed symmetrically with respect to a vertical plane that is perpendicular to the front-rear direction and passes through the center in the front-rear direction of thebase plate 16. - In the
base portions 16A, theweb 38A sides of theflanges 38B configureprojection portions 16C that are formed in pentagonal shapes in plan view, and the inside portions of theprojection portions 16C in theweb 38A width direction are formed in isosceles triangular shapes in plan view, with portions in thebase portions 16A other than inside portions in theweb 38A width direction of theprojection portions 16C formed as rectangular shapes in plan view. The inside portions in theweb 38A width direction of theprojection portions 16C have a dimension in theflange 38B width direction that gradually gets smaller on progression toward inside in theweb 38A width direction. Thecutaway portions 16E have a dimension in theweb 38A width direction that gradually gets larger on progression toward the outer side in theflange 38B width direction. Moreover, the inside ends in theweb 38A width direction of thebase portions 16A (the projection leading ends of theprojection portions 16C) are disposed at the lower side of theweb 38A. - In the
steel column 38, thebase portions 16A of thebase plate 16 are disposed at the lower side of each of theflanges 38B, and the lower ends of theflanges 38B are respectively welded to the upper faces of thebase portions 16A. Theprojection portions 16C of thebase portions 16A are disposed at the lower side of end portions in the width direction of theweb 38A, and the lower end of end portions in the width direction of theweb 38A are welded to the upper face of theprojection portions 16C. The connection portion 16D of thebase plate 16 is disposed at the lower side of the central portion of the width direction of theweb 38A, and the lower side of the central portion theweb 38A width direction is welded to upper face of the connection portion 16D. The position in the front-rear direction of the central portion in the width direction of the connection portion 16D is aligned with the position in the front-rear direction of the center in the thickness direction of theweb 38A. The dimension in the width direction of the connection portion 16D is, for example, set at from 3 times to 5 times the dimension in theweb 38A thickness direction (in the front-rear direction). - The present exemplary embodiment is also capable of exhibiting similar operation and advantageous effects to those of the first exemplary embodiment.
- The
base portions 16A are provided at the left side portion and the right side portion of thebase plate 16, and thecutaway portions 16E are provided between the pair ofbase portions 16A. - This thereby enables the weight of the
base plate 16 to be reduced, enabling excellent utilization efficiency (yield) of material for thebase plate 16. - Moreover, a drop load bearing ability of the column setup at a lower side portion of the
web 38A is suppressed by theweb 38A. The position between the pair ofbase portions 16A accordingly imparts only a small influence on the load bearing ability of thebase plate 16, enabling the load bearing ability of the column setup to be efficiently exhibited as before, even though thecutaway portions 16E are provided between the pair ofbase portions 16A. - Moreover, the
projection portions 16C of thebase portions 16A project out further than theflanges 38B to theweb 38A side at the lower side of theweb 38A, and the lower end of the end portions in theweb 38A width direction are welded to theprojection portions 16C. Moreover, at the lower side of theweb 38A, the connection portion 16D connects the pair ofbase portions 16A, and the lower end of the center portion in the width direction of theweb 38A is welded to the connection portion 16D. This thereby enables thesteel column 38 to be welded to thebase plate 16 strongly. - Moreover, at the left side portion and the right side portion (each of the
base portions 16A) of thebase plate 16, by forming the inside portions in theweb 38A width direction of theprojection portions 16C as isosceles triangles in plan view, theprojection portions 16C are made smaller, and thecutaway portions 16E are made larger. This thereby enables the weight of thebase plate 16 to be reduced further, and enabling more excellent utilization efficiency (yield) of material for the pair ofbase plates 16. - Note that in the present exemplary embodiment the
cutaway portions 16E are only provided on theweb 38A sides of theflanges 38B. However, thecutaway portions 16E may also be provided on the opposite side of theflanges 38B to theweb 38A side. - A
column structure 50 according to the third exemplary embodiment of the present invention is illustrated in a plan view inFIG. 4 . - The
column structure 50 according to the present exemplary embodiment is configured substantially the same as the first exemplary embodiment, but differs in the following points. - As illustrated in
FIG. 4 , in thecolumn structure 50 according to the present exemplary embodiment,mortar 14 is provided at the left side and the right side, with the pair ofmortars 14 each provided in a pentagonal shape, as illustrated in the plan view. - A
base plate 16 is provided in a pentagonal shape, as illustrated in the plan view, at the left side and the right side, with a gap 16B present between the pair ofbase plates 16, and themortars 14 on the left side and the right side are respectively disposed across the entire lower side of the left side and the rightside base plates 16. The pair ofbase plates 16 and the gap 16B are disposed symmetrically with respect to a vertical plane that is perpendicular to theweb 38A width direction and passes through the center in the width direction (left-right direction) of theweb 38A, and are also disposed symmetrically with respect to a vertical plane that is perpendicular to theflange 38B width direction and passes through the center in the width direction (the front-rear direction) of theflanges 38B. Moreover, the shape and the size in the plan view of the pair ofbase plate 16 and the and the gap 16B are the same as the shape and size of thebase plate 16 of the first exemplary embodiment in the plan view, with a pair of first fixing holes 18 similarly formed in the left side and rightside base plates 16 to those in the left side portion and the right side portion of thebase plate 16 in the first exemplary embodiment. - In the
base plates 16, theweb 38A sides of theflanges 38B configureprojection portions 16C that are formed in pentagonal shapes in the plan view, and the inside portions in theweb 38A width direction of theprojection portions 16C are formed in isosceles triangular shapes in the plan view, with portions in thebase plates 16 other than the inside portions in theweb 38A width direction of theprojection portions 16C formed as rectangular shapes in the plan view. The inside portions in theweb 38A width direction of theprojection portions 16C have a dimension in theflange 38B width direction that gradually gets smaller on progression toward inside in theweb 38A width direction, and the dimension in theweb 38A width direction of the gap 16B gradually gets larger on progression toward outer sides in theflange 38B width direction. The inside ends in theweb 38A width direction of the base plates 16 (the projection leading ends of theprojection portions 16C) are disposed at the lower side of theweb 38A. - In the
steel column 38, thebase plates 16 are disposed at the lower side of each of theflanges 38B, and the lower ends of theflanges 38B are respectively welded to the upper faces of thebase plates 16. Theprojection portions 16C of thebase plates 16 are disposed at the lower side of the end portions in the width direction of theweb 38A, and the lower end of end portions in the width direction of theweb 38A are welded to the upper face of theprojection portions 16C. At the lower side of the central portion in theweb 38A width direction, the gap 16B is disposed between the pair ofbase plates 16, and the lower ends of the center portion in the width direction of theweb 38A is not welded to thebase plates 16. - The present exemplary embodiment is also capable of exhibiting similar operation and advantageous effects to those of the first exemplary embodiment.
- Moreover, the
base plates 16 are provided at the lower side of each of theflanges 38B, and the gap 16B is provided between the pair of thebase plates 16. - Thus, the plan view size of each of the
base plates 16 can be made smaller, enabling the total weight of the pair ofbase plates 16 to be reduced, thereby enabling excellent utilization efficiency (yield) of material for the pair ofbase plates 16. - However, due to the
web 38A being disposed between the pair ofbase plates 16, a drop in load bearing ability of the portion of the column setup at the lower side of theweb 38A is suppressed from falling by theweb 38A, even in cases in which asingle base plate 16 is, hypothetically, present at the entire lower side of thesteel column 38. Thus the portion between the pair ofbase plates 16 is a portion that imparts small influence to the load bearing ability of the column setup. This thereby enables the load bearing ability of the column setup to be efficiently exhibited as before, even though the gap 16B is provided between the pair ofbase plates 16. - Moreover, the
projection portions 16C of thebase plates 16 project out further than theflanges 38B to theweb 38A side at the lower side of theweb 38A, and the lower ends of the end portions in theweb 38A width direction are welded to theprojection portions 16C. This thereby enablessteel column 38 to be welded to thebase plates 16 strongly. - Moreover, in the
base plates 16 on the left side and the right side, the inside portions in theweb 38A width direction of thebase plates 16 are formed in isosceles triangles in the plan view, such that theprojection portions 16C are smaller and the gap 16B is larger. This thereby enables the size of each of thebase plates 16 in the plan view to be made even smaller, enabling the total weight of the pair ofbase plates 16 to be further reduced, and enabling more excellent utilization efficiency (yield) of material for the pair ofbase plates 16. - Note that in the present exemplary embodiment, the gap 16B is only provided on the
web 38A side of theflanges 38B. However, the gap 16B may also be provided on the opposite side of theflanges 38B to theweb 38A side. - Moreover, in the first exemplary embodiment to the third exemplary embodiment, the center axial lines of the fixing holes 18 and the
anchor bolts 24 are disposed to the outer side in the width direction of theflanges 38B. However, the center axial lines of the fixing holes 18 and theanchor bolts 24 may be disposed at the inside in the width direction of theflanges 38B. - Moreover, in the first exemplary embodiment to the third exemplary embodiment, a pair of each of the fixing holes 18 and the
anchor bolts 24 is provided at each of the right side portion and the left side portion of thebase plate 16, or to each of the pair ofbase plates 16. However, it is sufficient for a single, or three or more, of each of the fixing holes 18 and theanchor bolts 24 to be provided at at least one of the right side portion or the left side portion of thebase plate 16, or to at least one of the pair ofbase plates 16. - Moreover, in the first exemplary embodiment to the third exemplary embodiment, all of the
anchor bolts 24 are anchored into thesame foundation concrete 12. Howeverdifferent anchor bolts 24 may be anchored to separate foundation concretes 12. -
- 10 column structure
- 12 foundation concrete (concrete)
- 16 base plate (base member, base body)
- 16A base portion
- 16B gap
- 16C projection portion
- 16D connection portion
- 16E cutaway portions
- 18 fixing hole (fixing portion)
- 22 indented portion
- 24 anchor bolt (anchor member)
- 30 anchor nut (anchor portion)
- 32 fixing plate (anchor portion)
- 38 steel column (column member)
- 38A web
- 38B flange
- 40 column structure
- 50 column structure
Claims (12)
1. A column structure comprising:
a column member that is integrally provided with a flange at each of both sides, in a width direction, of a web;
a base member to which the column member is joined at an upper side thereof; and
a plurality of anchor members, to each of which an anchor portion is attached at a lower end side thereof, each of which is anchored in concrete at the lower end side thereof, and each of which is fixed to the base member at an upper end side thereof, wherein a distance in a web width direction between the plurality of anchor members is equal to or less than a dimension, in the web width direction, of the column member.
2. The column structure of claim 1 , wherein the anchor members are disposed at outer sides, in a flange width direction, of the column member.
3. The column structure of claim 1 , wherein an indented portion is provided in a lower side face of the base member.
4. The column structure of claim 1 , wherein the base member comprises:
a base portion that is provided at each flange side;
a connection portion that connects together a pair of base portions; and
a cutaway portion that is provided between the pair of base portions.
5. The column structure of claim 1 , wherein the base member is provided at each flange side, and a gap is provided between base members.
6. The column structure of claim 5 , further comprising a projection portion that is provided at the base member and projects out to a web side of the flange at a lower side of the web.
7. A base member comprising:
a base body to which a column member is joined at an upper side thereof, the column member being integrally provided with a flange at each of both sides, in a width direction, of a web; and
a plurality of fixing portions that are provided at the base body, and that are each fixed at an upper end side of an anchor member, to which an anchor portion is attached at a lower end side thereof and which is anchored in concrete at the lower end side thereof, wherein a distance in a web width direction between the plurality of fixing portions is equal to or less than a dimension, in the web width direction, of the column member.
8. The base member of claim 7 , wherein the fixing portions are disposed at outer sides, in a flange width direction, of the column member.
9. The base member of claim 7 , wherein an indented portion is provided in a lower side face of the base body.
10. The base member of claim 7 , wherein the base body comprises:
a base portion that is provided at each flange side;
a connection portion that connects together a pair of base portions; and
a cutaway portion that is provided between the pair of base portions.
11. The base member of claim 7 , wherein the base body is provided at each flange side, and a gap is provided between base bodies.
12. The base member of claim 11 , further comprising a projection portion that is provided at the base body and projects out to a web side of the flange at a lower side of the web.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2014/057084 WO2015140894A1 (en) | 2014-03-17 | 2014-03-17 | Column structure and base member |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150259918A1 true US20150259918A1 (en) | 2015-09-17 |
Family
ID=54068342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/345,951 Abandoned US20150259918A1 (en) | 2014-03-17 | 2014-03-17 | Column structure and base member |
Country Status (3)
Country | Link |
---|---|
US (1) | US20150259918A1 (en) |
JP (1) | JPWO2015140894A1 (en) |
WO (1) | WO2015140894A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10844590B2 (en) | 2016-11-18 | 2020-11-24 | Senqcia Corporation | Column base structure for construction, and base plate |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6680467B2 (en) * | 2015-05-27 | 2020-04-15 | センクシア株式会社 | Structural column base structure and base plate |
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US4136811A (en) * | 1972-08-21 | 1979-01-30 | Kajima Corporation | H-shaped steel column base member and welding thereof |
US5063719A (en) * | 1988-09-07 | 1991-11-12 | Hitachi Metals, Ltd. | Column base structure |
US6219989B1 (en) * | 1997-09-29 | 2001-04-24 | Shinichi Tumura | Construction method of joining column and beam in building structure based on heavy-weight steel frame construction |
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US20060048471A1 (en) * | 2004-09-06 | 2006-03-09 | Research Institute Of Industrial Science & Technology | Strengthening device to increase strength of grout layer |
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JP2504555B2 (en) * | 1989-02-10 | 1996-06-05 | 日立金属株式会社 | Pillar structure |
JPH04153427A (en) * | 1990-10-16 | 1992-05-26 | Hitachi Metals Ltd | Pedestal |
JP2002146923A (en) * | 2000-11-15 | 2002-05-22 | Kawasaki Steel Corp | Anchorage structure of exposed column base |
US6754999B1 (en) * | 2001-05-04 | 2004-06-29 | Delmer L. Urbanczyk | Building construction system |
JP4006503B2 (en) * | 2001-12-06 | 2007-11-14 | 日立機材株式会社 | Column base hardware |
JP4903629B2 (en) * | 2007-05-11 | 2012-03-28 | 新日本製鐵株式会社 | Thin-wall lightweight steel structure bearing wall and foundation joint structure |
JP5730728B2 (en) * | 2011-09-16 | 2015-06-10 | 大成建設株式会社 | Column base structure |
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- 2014-03-17 WO PCT/JP2014/057084 patent/WO2015140894A1/en active Application Filing
- 2014-03-17 JP JP2014513831A patent/JPWO2015140894A1/en active Pending
- 2014-03-17 US US14/345,951 patent/US20150259918A1/en not_active Abandoned
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US4048776A (en) * | 1972-08-21 | 1977-09-20 | Kajima Corporation | Steel column base member |
US4136811A (en) * | 1972-08-21 | 1979-01-30 | Kajima Corporation | H-shaped steel column base member and welding thereof |
US5063719A (en) * | 1988-09-07 | 1991-11-12 | Hitachi Metals, Ltd. | Column base structure |
US6219989B1 (en) * | 1997-09-29 | 2001-04-24 | Shinichi Tumura | Construction method of joining column and beam in building structure based on heavy-weight steel frame construction |
US6367762B1 (en) * | 1997-11-19 | 2002-04-09 | Robert Bosch Gmbh | Base for securing shaped rods |
US6438904B1 (en) * | 1999-12-17 | 2002-08-27 | Mitsubishi Heavy Industries, Ltd. | Root wrapping type aseismic reinforcement construction and method for base of column member |
US20060048471A1 (en) * | 2004-09-06 | 2006-03-09 | Research Institute Of Industrial Science & Technology | Strengthening device to increase strength of grout layer |
US8336267B2 (en) * | 2008-10-31 | 2012-12-25 | Simpson Strong-Tie Company, Inc. | Construction frame shear lug |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US10844590B2 (en) | 2016-11-18 | 2020-11-24 | Senqcia Corporation | Column base structure for construction, and base plate |
Also Published As
Publication number | Publication date |
---|---|
WO2015140894A1 (en) | 2015-09-24 |
JPWO2015140894A1 (en) | 2017-04-06 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: HITACHI METALS TECHNO, LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TANAKA, HIDENORI;TAKAHASHI, HIDEAKI;REEL/FRAME:032639/0838 Effective date: 20140331 |
|
AS | Assignment |
Owner name: SENQCIA CORPORATION, JAPAN Free format text: MERGER;ASSIGNOR:HITACHI METALS TECHNO, LTD;REEL/FRAME:038129/0173 Effective date: 20151006 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |